/Engine/Source/Runtime/Engine/Public/GeomTools.h
2D version of RemoveRedundantTriangles from GeomTools
static void RemoveRedundantTriangles ( [TArray](API\Runtime\Core\Containers\TArray)< FVector2D > & OutTriangles, const [TArray](API\Runtime\Core\Containers\TArray)< FVector2D > & InTriangles )